Great wall of china dating
Several walls were being built from as early as the 7th century BC by ancient Chinese states; Later on, many successive dynasties have built and maintained multiple stretches of border walls.
The best known and most often repeated is that it is the only human-made structure on earth that can be seen from space; this is not true.
The Great Wall is visited by over four million people a year, and even though it cannot be seen from the moon, is among the most recognizable human-made structures in the world.
) is the collective name of a series of fortification systems generally built across the historical northern borders of China to protect and consolidate territories of Chinese states and empires against various nomadic groups of the steppe and their polities.
When Liu-Bang defeated Xiang-Yu in 202 BCE at the Battle of Gaixia, he became the First Emperor of the Han Dynasty and continued construction of the wall as a means of defense.
He was also the first emperor to use the wall as a means of regulating trade along the Silk Routes (better known as The Silk Road) from Europe to China.
As it turned out, the Liaoning Wall and the Great Wall were equally useless in repelling invasion. 1600 CE and continued until 1644 CE when the Great Wall was opened to the invaders.